It doesn't say on that page, but they have great integration with RemoteControlMail.com . GMail prints and sends my e-mail to them via snail mail, and RCM scans the mail back into electronic form and e-mails me once a day about it. It's a really great way to get all of your entire e-mail once a day (two business days later) without being bothered to check for it every 5 minutes.

Also, I have a filter set up on gmail that will parse the notification e-mails from RCM about new deliveries and forward them to my vlad-spam@gmail.com e-mail account. These are then also automatically printed, sent back to RCM, scanned, then e-mailed back to the original gmail address. This way, I am notified about the spam via gmail one day later than normal for each day of mail, thereby keeping the important mail in front.

I already know that yes, this just delays spam mail one day and you receive the previous spam mail the current day. I know. That is why I have applied for YCombinator funding to solve this problem alone. At least TechStars seemed interested in it.